Siemens GPC121.1P OpenAir Spring Return Damper Actuator lb-in - 35 24V 2-Position

The Siemens GPC121.1P is an OpenAir™ Direct Coupled Electronic Damper Actuator designed for reliable 2-position, spring return control in commercial HVAC applications. Operating on 24 VAC/DC, this rotary actuator delivers 35 lb-in (4 Nm) of torque and is engineered for economizer dampers, rooftop units, and air handling units.

Part of Siemens' proven GPC Series, this actuator features a compact footprint with a 60-second runtime and a fast 15-second spring return, ensuring fail-safe damper positioning in the event of a power interruption. The plenum-rated housing makes it suitable for air-side installations where building code compliance is required.

Key Features:

• Torque Output: 35 lb-in (4 Nm) for effective damper control
• Control Type: On/Off, 2-Position spring return (SR)
• Supply Voltage: 24 VAC/DC
• Runtime: 60 seconds (open); 15-second spring return (close)
• Mounting: Direct coupled rotary design — no linkage required
• Housing: Plenum-rated rugged plastic construction
• Application: Economizer control, rooftop units (RTUs), and air handling units (AHUs)
• Ideal OEM choice across a full range of spring return actuator torques from 20 to 160 lb-in

The GPC121.1P offers long-lasting performance in a space-saving design, making it a dependable solution for OEM and replacement applications in light commercial and commercial HVAC systems.